As the title says I wanted to try the FPS Microgame tutorial. The very first thing it has you do is click play. Whatever it does afterwards completely locks all controls save for the windows key. You cannot move, you cannot move the mouse, and pressing ESC does nothing. The only way to escape is to press the windows key which will remove focus. Should unity ever become the focus again you will be locked just like before.

This is running on Unity 2018.4.18f1. It is a completely fresh install. I've tried to uninstall it, and reinstall it completely. Nothing has changed. I am using Windows 10 version 1909 and build 18363.719.